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Clustering ECG complexes using Hermite functions and self-organizing maps

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5 Author(s)
Lagerholm, M. ; Dept. of Theor. Phys., Lund Univ., Sweden ; Peterson, C. ; Braccini, G. ; Edenbrandt, L.
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An integrated method for clustering of QRS complexes is presented which includes basis function representation and self-organizing neural networks (NN's). Each QRS complex is decomposed into Hermite basis functions and the resulting coefficients and width parameter are used to represent the complex. By means of this representation, unsupervised self-organizing NNs are employed to cluster the data into 25 groups. Using the MIT-BIH arrhythmia database, the resulting clusters are found to exhibit a very low degree of misclassification (1.5%). The integrated method outperforms, on the MIT-BIH database, both a published supervised learning method as well as a conventional template cross-correlation clustering method

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Biomedical Engineering, IEEE Transactions on  (Volume:47 ,  Issue: 7 )